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Ecodur 201: NZ Balcony Coating Project (Titus)

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Salt-laden air, combined with high UV, is hard on building materials, especially if they do not have any kind of protective coating. The University of the Basque Country in Spain has applied scientific methods to demonstrate how the marine aerosols produced by the interaction of the wind and the waves can have harmful effects on nearby buildings.


The aerosol is a suspension of inorganic salts and organic matter in minute particles that is transported by the air and with the rain. These particles, present in the marine aerosol, may undergo different chemical reactions in the atmosphere and they can be deposited on construction materials along with other particles present in urban-industrial atmospheres coming from anthropogenic sources (road traffic, industry, etc.).

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The subsequent chemical interactions can attack construction materials causing material loss, formation of salts, cracks, fissures, crust formation, etc.

University of Iowa has studied buildings and statues constructed of limestone and concluded they can be protected from pollution by applying a thin, single layer of a water-resistant coating, according to new research. Researchers developed a new way to minimize chemical reactions that cause limestone buildings to deteriorate.

This case study concerns a private harborside residence in New Zealand built around 1950 which has a large concrete balcony built over living quarters.

Over the decades the balcony’s concrete has suffered significant cracking that had resulted in serious leaking to the accommodation below. Titus Waterproofing, of South Dunedin, were called in by a leading building company and asked if they could stop the balcony area leaking while also providing an aesthetic and permanent solution.

The clients also wanted a benign coating that did not create noxious fumes. Ecodur is not only completely VOC-free, solvent-free, BPA-free, it is also certified for contact with drinking water. Furthermore, it is also Class A flame retardant, and has double the adhesion of most conventional epoxy protective coatings making it particularly suitable for applications to concrete.

With the buildings exposure to marine aerosols, it is also noteworthy that 20-year plus brine tests on a sample of shaved Ecodur, have shown absolutely no measurable signs of deterioration. It has also had extensive use as a ship deck coating where its high UV resistance, ultra-high adhesion and permanent flexibility, has been very effective.


Titus prepared some Ecodur costings and test samples onsite and at Titus’ workshop. Titus gave the concrete an extensive grind to provide a smooth and completely dry surface. Ecodur 201 was applied and finished to give it a polished concrete look.

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Application Results
An inspection after the full cure time of 24 hours, showed the balcony coating had no anomalies and declared ready for use by the residents. Titus subsequently reported the clients were ‘over the moon’ with the appearance of the balcony and the knowledge that they now have totally dry living spaces below the finished balcony.

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